feat(events): harden registration checkout lifecycle

apps/events/tests/integration/test_events.py

@@ -3,7 +3,7 @@ import io
 import json
 import tempfile
 import uuid
-from datetime import timedelta
+from datetime import datetime, time as datetime_time, timedelta
 from types import SimpleNamespace
 from PIL import Image
 from django.core.files.uploadedfile import SimpleUploadedFile
@@ -110,6 +110,115 @@ class TestEventsAPIIntegrationTests:
         assert response.status_code == 200
         assert any((item['id'] == event.id for item in response.json()))
 
+    def test_browse_events_returns_numbered_pages_and_global_price_ceiling(self):
+        self._create_event(title='Price ceiling 650k toman', price=6500000)
+        self._create_event(title='Price ceiling 4.3m toman', price=43000000)
+        for index in range(13):
+            self._create_event(title=f'Browse page event {index}', price=100000)
+
+        first_page = self.client.get('/api/events/browse/', {'page': 1})
+        second_page = self.client.get('/api/events/browse/', {'page': 2})
+
+        assert first_page.status_code == 200
+        assert first_page.json()['count'] == 17
+        assert first_page.json()['page'] == 1
+        assert first_page.json()['page_size'] == 12
+        assert first_page.json()['total_pages'] == 2
+        assert len(first_page.json()['results']) == 12
+        assert second_page.json()['page'] == 2
+        assert len(second_page.json()['results']) == 5
+        assert first_page.json()['price_ceiling'] == 5000000
+        assert 'address' in first_page.json()['results'][0]
+
+    def test_browse_events_upcoming_includes_future_events_that_cannot_register(self):
+        now = timezone.now()
+        open_event = self._create_event(
+            title='Browse open event',
+            start_time=now + timedelta(days=4),
+            end_time=now + timedelta(days=4, hours=2),
+            registration_start_date=now - timedelta(days=1),
+            registration_end_date=now + timedelta(days=2),
+        )
+        not_started = self._create_event(
+            title='Browse not started event',
+            start_time=now + timedelta(days=5),
+            end_time=now + timedelta(days=5, hours=2),
+            registration_start_date=now + timedelta(days=1),
+        )
+        closed = self._create_event(
+            title='Browse closed event',
+            start_time=now + timedelta(days=6),
+            end_time=now + timedelta(days=6, hours=2),
+            registration_end_date=now - timedelta(minutes=1),
+        )
+        full = self._create_event(
+            title='Browse full event',
+            start_time=now + timedelta(days=7),
+            end_time=now + timedelta(days=7, hours=2),
+            capacity=1,
+        )
+        self._create_registration(full, self.user, status=Registration.StatusChoices.CONFIRMED)
+
+        upcoming = self.client.get('/api/events/browse/', {'state': 'upcoming', 'search': 'Browse'}).json()
+        open_results = self.client.get('/api/events/browse/', {'state': 'open', 'search': 'Browse'}).json()
+        upcoming_ids = {item['id'] for item in upcoming['results']}
+        open_ids = {item['id'] for item in open_results['results']}
+
+        assert {not_started.id, closed.id, full.id}.issubset(upcoming_ids)
+        assert open_event.id not in upcoming_ids
+        assert open_ids == {open_event.id}
+
+    def test_browse_events_filters_start_dates_inclusive_and_combines_type_price_and_free(self):
+        selected_day = timezone.localdate()
+        local_timezone = timezone.get_current_timezone()
+
+        def at(day, hour, minute):
+            return timezone.make_aware(datetime.combine(day, datetime_time(hour, minute)), local_timezone)
+
+        start_day = self._create_event(
+            title='Date range probe free',
+            event_type=Event.TypeChoices.ONLINE,
+            price=0,
+            start_time=at(selected_day, 0, 0),
+            end_time=at(selected_day, 2, 0),
+        )
+        end_day = self._create_event(
+            title='Date range probe paid online',
+            event_type=Event.TypeChoices.ONLINE,
+            price=300000,
+            start_time=at(selected_day, 23, 59),
+            end_time=at(selected_day + timedelta(days=1), 1, 0),
+        )
+        self._create_event(
+            title='Date range probe paid onsite',
+            event_type=Event.TypeChoices.ON_SITE,
+            price=300000,
+            start_time=at(selected_day, 12, 0),
+            end_time=at(selected_day, 14, 0),
+        )
+        outside_day = self._create_event(
+            title='Date range probe outside',
+            event_type=Event.TypeChoices.ONLINE,
+            price=300000,
+            start_time=at(selected_day + timedelta(days=1), 0, 0),
+            end_time=at(selected_day + timedelta(days=1), 2, 0),
+        )
+
+        params = {
+            'search': 'Date range probe',
+            'date_from': selected_day.isoformat(),
+            'date_to': selected_day.isoformat(),
+            'event_type': Event.TypeChoices.ONLINE,
+            'price_min': 10000,
+            'price_max': 40000,
+        }
+        paid_results = self.client.get('/api/events/browse/', params).json()
+        free_results = self.client.get('/api/events/browse/', {**params, 'free_only': 'true'}).json()
+
+        assert {item['id'] for item in paid_results['results']} == {end_day.id}
+        assert {item['id'] for item in free_results['results']} == {start_day.id}
+        assert outside_day.id not in {item['id'] for item in paid_results['results']}
+
     def test_list_events_handles_comma_status_parameter(self):
         event = self._create_event(title='Comma Event', status=Event.StatusChoices.PUBLISHED)
         results = list_events(None, status=f'{Event.StatusChoices.PUBLISHED},{Event.StatusChoices.DRAFT}', event_type=None, search=None, limit=10, offset=0)